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Improper handling of exceptional conditions in VX800v v1.0 in SIP processing allows an attacker to flood the device with crafted INVITE messages, blocking all voice lines and causing a denial of service on incoming calls.

CVE-2025-15542 identifies a vulnerability in the TP-Link VX800v version 1.0, a VoIP gateway device, where improper handling of exceptional or unusual conditions during SIP INVITE message processing leads to a denial of service (DoS). Specifically, the device fails to correctly manage or validate exceptional SIP INVITE requests, allowing an attacker to flood the device with crafted INVITE messages. This flood exhausts the device's resources or blocks all voice lines, effectively preventing legitimate incoming calls from being processed. The vulnerability is classified under CWE-754, which relates to improper checks for unusual or exceptional conditions, indicating a logic or input validation flaw in the SIP processing module. The CVSS 4.0 vector indicates that the attack can be performed remotely (AV:N), requires low attack complexity (AC:L), no privileges (PR:N), no user interaction (UI:N), and does not affect confidentiality or integrity but impacts availability to a low degree (VA:L). The vulnerability affects version 1.0 of the VX800v device, with no patches currently available and no known exploits in the wild. The device is typically deployed in enterprise or small-to-medium business environments for voice communication over IP networks. Exploitation could disrupt telephony services, impacting business operations that rely on uninterrupted voice communications.

Detailed information about CVE-2025-15542: CWE-754 Improper Check for Unusual or Exceptional Conditions in TP-Link Systems Inc. VX800v v1.0 affecting TP-Link Sy

CVE-2025-15542: CWE-754 Improper Check for Unusual or Exceptional Conditions in TP-Link Systems Inc. VX800v v1.0 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-15542: CWE-754 Improper Check for Unusual or Exceptional Conditions in TP-Link Systems Inc. VX800v v1.0

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